Carnitine Free and Total, Plasma
Test Mnemonic
CARNFT
CPT Codes
- 82379 - QTY (1)
Includes
- Carnitine Total
- Carnitine Free (FC)
- Acylcarnitine (AC)
- AC/FC Ratio
- Interpretation
Performing Laboratory
Mayo Clinic Dpt of Lab Med & Pathology
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Plasma | Sodium heparin (Green) | Frozen | Patient age is required. Centrifuge and aliquot plasma into standard aliquot tube. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Plasma | EDTA (Lavender) | Frozen | Patient age is required. Centrifuge and aliquot plasma into standard aliquot tube. | |
| 0.5 mL | Plasma | Lithium heparin (Green) | Frozen | Patient age is required. Centrifuge and aliquot plasma into standard aliquot tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.2 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | 60 days |
| Refrigerated | 21 days |
| Ambient | 7 days |
Days Performed
Mon - Fri
Turnaround Time
4 - 6 days
Methodology
| Name | Description |
|---|---|
| Flow Injection Analysis-Tandem Mass Spectrometry (FIA-MS/MS) |
Special Info
This test is New York State approved.
Clinical Info
This test is useful for evaluation of patients with a clinical suspicion of a wide range of conditions including organic acidemias, fatty acid oxidation disorders, and primary carnitine deficiency using plasma specimens.